Heyyy guys!!
See the attachment please...
Can anyone solve this!!!!!
Please ans asap...
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no the echo is not head because the minimum distance for the echo To be heard is 17.2m so echo is not heard
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khyati4267:
how do u know that the distance is less than 17.2m?
because they room is 12cm wide only
it is given in question
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plz
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